5 923 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
39615112643045557727531880705107806493554991	44	144.8	2016-06-11 05:24:20

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	10353 / 16550

Estimated T-Level: 48.1 ⓘ

TF below 2^155 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	1D8E	0
Verified (Factored)		George Woltman	02923F2BC99E1D8E	0
Verified (Factored)		Brian J. Beesley	02923F2BC99E1D8E	0
Verified (Factored)	2015-04-11	MadPoo	02923F2BC99E1D8E	2473

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	4F330A95867A2241	1	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	4F330A95867A2241	1	0	1	3
Verified	2017-12-07	ATH	4F330A95867A2241	1	729	1	3
Verified	2020-04-17	Oliver Kruse	43455F6E38DA8675	1	1563	5	3
Verified	2024-02-03	Wentao Huang	43455F6E38DA8675	1	5192	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M5923/39615112643045557727531880705107806493554991 : 43455F6E38DA8675 PRP: Verified PRP without proof (small exponent)
2023-07-24	-Anonymous-	NF-PM1	B1=42000000000, B2=171618195782983950
2020-04-17	Oliver Kruse	C-PRP	M5923/39615112643045557727531880705107806493554991 : 43455F6E38DA8675 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M5923/39615112643045557727531880705107806493554991 : 4F330A95867A2241 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M5923/39615112643045557727531880705107806493554991 : 4F330A95867A2241 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M5923/known_factors : 4F330A95867A2241 PRP without proof (not generated)
2016-06-11	Carsten Kossendey	F-ECM	Factor: 39615112643045557727531880705107806493554991 / (ECM curve 47, B1=44000000, B2=4400000000)
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-08-12	Sid & Andy	NF	no factor from 2^61 to 2^62
2015-05-20	MadPoo	NF-PM1	B1=100000000000
2015-04-11	MadPoo	C-LL	02923F2BC99E1D8E
2012-10-11	bcp19	NF	no factor from 2^60 to 2^61
2011-05-09	Joss	NF-PM1	B1=10000000000
2011-01-04	monst	NF	no factor from 2^58 to 2^60